On-Demand Capacity Reservations presented by Amazon EC2

Amazon Elastic Compute Cloud (Amazon EC2) is a web service that offers resizable compute capacity which is secured in the cloud. It is created to build web-scale cloud computing simple for developers with least friction. You can keep Amazon EC2 capacity for any duration with On-Demand Capacity Reservations. Amazon EC2 gives an extensive choice of instance types around 50 global Availability Zones where you can operate your applications.

Some customers though have very certain requisite for portions of their applications over instance type, size, and capability, as well as the Availability Zone the instance requires to operate in, and very high levels of affirmation that they will always be able to organize that certain capacity. Formerly, in order to reach a capacity reservation, customers had to hold Zonal Reserved Instances and commit to that capacity for a minimum of one year. Customers can retain the accurate capacity they require in the place they require, and can hold it only for as long as they require it through On-Demand Capacity Reservations.

On-Demand Capacity Reservations are triggered as soon as they are solicited and they remain operative until cancelled. A Capacity Reservation is bound to a certain Availability Zone and, by default automatically used by running instances in that Availability Zone. Instances you have placed Capacity Reservations for are charged at the normal instance rate for as long as you keep the reservation. You can cancel your Capacity Reservation at any time to stop paying. You can design and manage Capacity Reservations by the AWS Management Console, AWS SDK and Command Line Interface CLI.